Scenario:
A client makes a call into a custom library function. Library function in turn makes a call to an external web service/WCF service by using add service reference and throws an exception.
This is very common in Excel UDF, Office customizations...

Microsoft Customers have asked the following and other questions about the VSTO shadow copy feature. This blog will discusses VSTO and shadow copy. Here are frequent questions:
1) VSTO customization writes a DLL to a temporary location. Is that mandatory...

A few days back, I’ve got a case where my customer wanted to resize the embedded OLE Object programmatically? In this case Excel was embedded in Visio, that embedded file added to the shapes collection in Visio but in reality its nothing but an OLE document...

In one of my recent cases; one of my customer has installed Visual Studio 2008 SP1, then he tried to create a new Word/Excel add-in project and he gets the following exception :- "Customization could not be loaded because the application domain could...

A developer using MapPoint 2006 and Visual Studio 2008 on Vista was developing a windows based application, with the MapPoint control placed on the windows form. He was using the following code:
Private _objMap As MapPoint.Map Private Sub Form1_Load...

This post helps troubleshoot Office COM Add-In load failures. As there can be many factors contributing to the failure, it is necessary that we be methodical when we approach this issue to ensure we haven’t missed anything simple....